DSD is a far more analog-like encoding and decoding process than classic PCM. Sometimes the simplest path is the best sounding one. PCM, on the other hand, can produce great sounding music but to do so requires a very complex and technically daunting conversion process to produce something you can play on your system. DSD sample rates are 64 times higher than those used to create CDs and the output of a DSD stream can be placed through a simple filter to produce pure analog ready to feed your audio system. Millions of CDs and high-resolution downloads worldwide will gain new life, and be saved from obsolescence.ĭSD is a high sample rate single-bit format while PCM is a lower sample rate many-bit format. In the process, the PCM feed becomes more linear, less edgy, and never-before-heard musical details are released from all digital audio recordings. DSJ converts all digital inputs, including PCM, to pure 1-bit DSD, in an elegantly-simple path. Put PCM (how CDs are recorded) into DSJ, you get DSD. In order to extract everything hidden in PCM recordings, a completely new processing method is needed. Happily, the missing musical information is still buried deep within our audio librarieswaiting to be revealed. Fortunately musics details have been more faithfully recorded than we ever suspected, but the cover-up of those recorded details has been with us for more than 30 years. The problem is the PCM decoding process itself: whether a classic ladder-DAC or more modern multi-bit Sigma-Delta type, most PCM playback processors mask some of the subtle cues in music. The poor results of the first CDs might not have been a problem if Sony and Philips had waited another decade, passing over the classic PCM delivery system in favor of PDM (DSD). There had to be a better way to fulfill the promise of analogs century of dominance for sounding like music and PCM would not be it. The launch of the PCM-based Compact Disc would set in motion a 30-year war amongst Audiophiles, decimate the analog format, cover up subtle musical details for decades and turn the music and audio industries upside downand not necessarily in a good way. Unfortunately those early CDs sounded less musical than analog. No wonder that when, in 1982, Sony and Philips announced they had achieved Perfect Sound Forever, music lovers around the world waited in eager anticipation of analogs promise finally fulfilled. Despite the very listenable music coming through those grooves, the audio world wanted more: greater dynamic range, lower noise, extended frequency response. In 1981, music was reproduced exclusively on analog-based turntables and tape decks with limited dynamic range. This is the experience DSJ affords its owners who enjoy a renewed sense of enjoyment and discovery when listening to everything in their library: CDs, downloads, DSD. Imagine going to a recording studio and listening to a master tape of any recording made. This means that your entire library of music can finally reveal all the music and subtle low level details buried deep within its core and now, at a more affordable price than its progenitor, DirectStream. DSJ solves this problem by employing a pure DSD single-bit approach for both PCM as well as DSD media. Classic PCM-based DACS, including many of todays DACS that can also process DSD, tend to cover up some of the subtle musical details buried deep within digital audio music a problem inherent in their architecture. CDs, downloads, high-resolution PCM or DSD based media are expertly upsampled in the DSJ to ten times DSD rate and output as pure analog directly into your amplifier or preamplifier. How was this accomplished? Lower cost chassis and user interface.ĭSJ, like DirectStream, is hand-written, discrete, perfection based conversion that uncovers all the missing information hiding in your digital audio media for all these years. The idea behind the DSJ was to offer near-identical performance at a fraction of the cost. Introducing DirectStream Junior (DSJ), a world class DAC based on the architecture of the Stereophile and Absolute Sounds Product Of The Year, DirectStream.ĭSJ uses the same FPGA architecture and customized code as PS Audios DirectStream DAC, and it is designed and built by the exact same team.
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